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<?php declare(strict_types=1);
/*
* This file is part of sebastian/exporter.
*
* (c) Sebastian Bergmann <sebastian@phpunit.de>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace SebastianBergmann\Exporter;
use function bin2hex;
use function count;
use function get_resource_type;
use function gettype;
use function implode;
use function ini_get;
use function ini_set;
use function is_array;
use function is_bool;
use function is_float;
use function is_object;
use function is_resource;
use function is_string;
use function mb_strlen;
use function mb_substr;
use function preg_match;
use function spl_object_id;
use function sprintf;
use function str_repeat;
use function str_replace;
use function var_export;
use BackedEnum;
use SebastianBergmann\RecursionContext\Context;
use SplObjectStorage;
use UnitEnum;
final class Exporter
{
/**
* Exports a value as a string.
*
* The output of this method is similar to the output of print_r(), but
* improved in various aspects:
*
* - NULL is rendered as "null" (instead of "")
* - TRUE is rendered as "true" (instead of "1")
* - FALSE is rendered as "false" (instead of "")
* - Strings are always quoted with single quotes
* - Carriage returns and newlines are normalized to \n
* - Recursion and repeated rendering is treated properly
*/
public function export(mixed $value, int $indentation = 0): string
{
return $this->recursiveExport($value, $indentation);
}
public function shortenedRecursiveExport(array &$data, ?Context $context = null): string
{
$result = [];
$exporter = new self;
if (!$context) {
$context = new Context;
}
$array = $data;
/* @noinspection UnusedFunctionResultInspection */
$context->add($data);
foreach ($array as $key => $value) {
if (is_array($value)) {
if ($context->contains($data[$key]) !== false) {
$result[] = '*RECURSION*';
} else {
$result[] = sprintf('[%s]', $this->shortenedRecursiveExport($data[$key], $context));
}
} else {
$result[] = $exporter->shortenedExport($value);
}
}
return implode(', ', $result);
}
/**
* Exports a value into a single-line string.
*
* The output of this method is similar to the output of
* SebastianBergmann\Exporter\Exporter::export().
*
* Newlines are replaced by the visible string '\n'.
* Contents of arrays and objects (if any) are replaced by '...'.
*/
public function shortenedExport(mixed $value): string
{
if (is_string($value)) {
$string = str_replace("\n", '', $this->export($value));
if (mb_strlen($string) > 40) {
return mb_substr($string, 0, 30) . '...' . mb_substr($string, -7);
}
return $string;
}
if ($value instanceof BackedEnum) {
return sprintf(
'%s Enum (%s, %s)',
$value::class,
$value->name,
$this->export($value->value),
);
}
if ($value instanceof UnitEnum) {
return sprintf(
'%s Enum (%s)',
$value::class,
$value->name,
);
}
if (is_object($value)) {
return sprintf(
'%s Object (%s)',
$value::class,
count($this->toArray($value)) > 0 ? '...' : '',
);
}
if (is_array($value)) {
return sprintf(
'[%s]',
count($value) > 0 ? '...' : '',
);
}
return $this->export($value);
}
/**
* Converts an object to an array containing all of its private, protected
* and public properties.
*/
public function toArray(mixed $value): array
{
if (!is_object($value)) {
return (array) $value;
}
$array = [];
foreach ((array) $value as $key => $val) {
// Exception traces commonly reference hundreds to thousands of
// objects currently loaded in memory. Including them in the result
// has a severe negative performance impact.
if ("\0Error\0trace" === $key || "\0Exception\0trace" === $key) {
continue;
}
// properties are transformed to keys in the following way:
// private $propertyName => "\0ClassName\0propertyName"
// protected $propertyName => "\0*\0propertyName"
// public $propertyName => "propertyName"
if (preg_match('/\0.+\0(.+)/', (string) $key, $matches)) {
$key = $matches[1];
}
// See https://github.com/php/php-src/commit/5721132
if ($key === "\0gcdata") {
continue;
}
$array[$key] = $val;
}
// Some internal classes like SplObjectStorage do not work with the
// above (fast) mechanism nor with reflection in Zend.
// Format the output similarly to print_r() in this case
if ($value instanceof SplObjectStorage) {
foreach ($value as $_value) {
$array['Object #' . spl_object_id($_value)] = [
'obj' => $_value,
'inf' => $value->getInfo(),
];
}
$value->rewind();
}
return $array;
}
private function recursiveExport(mixed &$value, int $indentation, ?Context $processed = null): string
{
if ($value === null) {
return 'null';
}
if (is_bool($value)) {
return $value ? 'true' : 'false';
}
if (is_float($value)) {
$precisionBackup = ini_get('precision');
ini_set('precision', '-1');
$valueAsString = @(string) $value;
ini_set('precision', $precisionBackup);
if ((string) @(int) $value === $valueAsString) {
return $valueAsString . '.0';
}
return $valueAsString;
}
if (gettype($value) === 'resource (closed)') {
return 'resource (closed)';
}
if (is_resource($value)) {
return sprintf(
'resource(%d) of type (%s)',
(int) $value,
get_resource_type($value),
);
}
if ($value instanceof BackedEnum) {
return sprintf(
'%s Enum #%d (%s, %s)',
$value::class,
spl_object_id($value),
$value->name,
$this->export($value->value, $indentation),
);
}
if ($value instanceof UnitEnum) {
return sprintf(
'%s Enum #%d (%s)',
$value::class,
spl_object_id($value),
$value->name,
);
}
if (is_string($value)) {
// Match for most non-printable chars somewhat taking multibyte chars into account
if (preg_match('/[^\x09-\x0d\x1b\x20-\xff]/', $value)) {
return 'Binary String: 0x' . bin2hex($value);
}
return "'" .
str_replace(
'<lf>',
"\n",
str_replace(
["\r\n", "\n\r", "\r", "\n"],
['\r\n<lf>', '\n\r<lf>', '\r<lf>', '\n<lf>'],
$value,
),
) .
"'";
}
$whitespace = str_repeat(' ', 4 * $indentation);
if (!$processed) {
$processed = new Context;
}
if (is_array($value)) {
if (($key = $processed->contains($value)) !== false) {
return 'Array &' . $key;
}
$array = $value;
$key = $processed->add($value);
$values = '';
if (count($array) > 0) {
foreach ($array as $k => $v) {
$values .=
$whitespace
. ' ' .
$this->recursiveExport($k, $indentation)
. ' => ' .
$this->recursiveExport($value[$k], $indentation + 1, $processed)
. ",\n";
}
$values = "\n" . $values . $whitespace;
}
return 'Array &' . (string) $key . ' [' . $values . ']';
}
if (is_object($value)) {
$class = $value::class;
if ($processed->contains($value) !== false) {
return $class . ' Object #' . spl_object_id($value);
}
$processed->add($value);
$values = '';
$array = $this->toArray($value);
if (count($array) > 0) {
foreach ($array as $k => $v) {
$values .=
$whitespace
. ' ' .
$this->recursiveExport($k, $indentation)
. ' => ' .
$this->recursiveExport($v, $indentation + 1, $processed)
. ",\n";
}
$values = "\n" . $values . $whitespace;
}
return $class . ' Object #' . spl_object_id($value) . ' (' . $values . ')';
}
return var_export($value, true);
}
}